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From: 류호은 <hoeun.ryu@lge.com>
To: <mingo@kernel.org>, <peterz@infradead.org>, <aaron.lu@intel.com>,
	<adobriyan@gmail.com>, <frederic@kernel.org>,
	<ying.huang@intel.com>
Cc: <linux-kernel@vger.kernel.org>
Subject: smp_call_function() friends and irq/bottom_half context
Date: Thu, 10 May 2018 13:58:29 +0900	[thread overview]
Message-ID: <00fb01d3e81b$89b9c2d0$9d2d4870$@lge.com> (raw)

Hi, all.

I'm reading kernel/smp.c code and I found comments on smp_call_function()
and smp_call_function_[single/many]
saying that these functions are cannot be called in interrupt disabled
context or irq/bottom half handlers.

I understand that there is a potential deadlock issue when caller CPU of
the functions is waiting for the completion of the callback of other CPUs.
But I was wondering if this is the case even when the caller CPU doesn't
wait for the completion (wait == 0).

Thank you.

             reply	other threads:[~2018-05-10  4:58 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-05-10  4:58 류호은 [this message]
2018-05-10 10:16 ` smp_call_function() friends and irq/bottom_half context Peter Zijlstra
2018-05-11  6:24   ` Hoeun Ryu

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